Production of methanol, acetaldehyde, and acetone in the Atlantic Ocean. Issue 17 (12th September 2013)

• Record Type: Journal Article
• Authors: Dixon, Joanna L.; Beale, Rachael; Nightingale, Philip D.
• Is Part Of: Geophysical research letters. Volume 40:Issue 17(2013:Sep.)
• Page Start: 4700
• Page End: 4705
• Publication Date: 2013-09-12
• Subjects: Geophysics -- Periodicals; Planets -- Periodicals; Lunar geology -- Periodicals; 550
• DOI: 10.1002/grl.50922
• Languages: English
• ISSNs: 0094-8276

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>[1] The biogeochemistry of oxygenated volatile organic compounds (OVOCs) like methanol, acetaldehyde, and acetone in marine waters is poorly understood. We report the first in situ gross production rates for methanol, acetaldehyde, and acetone of 49–103, 25–98, and 2–26 nmol L⁻¹ d⁻¹ over contrasting areas of marine productivity, including oligotrophic gyres and eutrophic upwellings. Photochemical production estimates are mostly negligible for methanol, up to 68% for acetaldehyde and up to 100% of gross production rates for acetone. Microbial surface OVOC oxidation to CO₂ accounts for between 10–50% and 0.5–13% of the methanol and acetone losses, respectively, but largely control acetaldehyde concentrations (49–100%). Biological lifetimes in a coastal upwelling vary between ≤1 day for acetaldehyde, to approximately 7 days for methanol and up to ~80 days for acetone. In open oceanic environments, the lifetime of acetaldehyde ranges between 2 and 5 h, compared to 10–26 days for methanol and 5–55 days for acetone.</p> </abstract>